Friction draft and buffing gear.



UNITED STATES PATENT OFFICE.

DONALD C. DAVIS, Oi BUFFALQ, NEW YORK, ASSIGNOR T0 GOULD COUPLER COMPANY, OF NEW YRK, N. Y.

FRICTION DRAFT AND BUFEING GEAR.

Application filed May 25. 191'?.

To HN ie/iom 'it muy Com-em.:

lie it known that` l. l)o.\'.\i.o lime'. a. citizen ol' the llnited Staten residing' rat, lntlalo, in the woont)^ olA llrie and State otI New York` have invented a new and nset'nl lmproven'lent in Friction Draft and lnlliinpr (ears. ol whit-h the t'ollowinj.:` is a speifitioation.

The` invention relate` more pariienlarl) to l'rietion dral't and liutlinpY dex ieee for pivV oted eonp|er ol' the kind ohh-h are uned on railwirv loijoniotii'e and tendere. rl`he in-l vention in not. however. liereesaril' re ntrirted in applifation to th'eu lvpe olj eine pler.

lh'al'l and lnrlliin;Y deriven ot this kind as heretofore made do not, have eulliiient eaparityv to rllshion or ahsorh the severe shocks. to which theyy would he enhjeeted it used in ('onnei'tion with the larger modern loon-- motives. sneh for exanipl` aS the, triple articulated type. which have. approinmtely three time` the, traetivo eort'y of the ordinary loeoinotive need in freight .service f: thehe loeoinotives are eonnnontv uned in pushingA Servir-e. it will he apparent that the draft and hailing' device# used lherewith nnlst have a` hnllinp tapaoity nnnh greater than derives ot thinl kind heretofore iliade.

The ohjeets ot' the invention are to provide a ronihined 'friction dra l't and hnling device whit-h hab` adequate eapaeity to enshion the drain or pulling stresses to which it is snhjeeted, and han nnllieient additional hailing capacity to enshion or abaorh the nerere Shock` to whieh the deviene in subjected when used in connection with the larg;A r modern locomotives; also to provide a i vice o1' this kind of eolnpaet form adapted to he arranged in the huier or pilot beam of a locomotive or end sill of a tender or railway ear; also tio improve the construe tion of devices of this kind in other respects hereinafter specified.

In the aeronilninying drawings:

Figure 1l is a fragmentary top plan View Qi I u l of a piloti beam or end sill and lrietiion draft and hutliin;r device embodying the invention. the beam or Sill being partly ln ken away to Show the draft and boiling dex ice.

Fig. 2 is a longitudinal sectional elevation thereof on line 2*?, Fig. 1. showing the coupler shank and yoke in elevation.

Fig. 3 is a transverse Sectional elevation thereof on line 33 Fig'. 1.

Briefly stated, the draft and bnlng de- Speeicaton of Letters Patent.

Patented Ovt. 29, 1918.

Serial No. 170.994.

riee shown in the drawings ineludes two lriet'ion elements which are arranged in a mitahle housing' or drawhar Chamber preferahljv formed in a hollow end sill or heam and adapted to eushon the shocks transmitted to the eoupler. which in also Supported ou the end sill or pilot healn. One of the frittion elemente resiets strains due to holh hntiinpr and polling and hoth ol' the elements eooperate in reeieting shot-ka due, to hnlh'ngf. the fle-vire lim inov greater Paparit v in hailing' than in pulling,

A repreeenh` a hollow metal lli-ani or sill adapted to he leed on :i loromotiie. lender or pieve ol rollingv vetoek. and whirh is provided with a drawhaiehaniher o and a pluralitv ol chambers or pin-hete. in whieh the parte ot' the triet'ion dral't and halting: devire are arranged. The drawhar rhalnoer is preterahli` formed n# hown in the lower middle portion ot' the hollow end sill. The yill orgia-ani nhown in the drawings i provided with a forward enlargenunt or projet-tiny; portion u haing an openingr n2 through nhieh the shank ot the coupler eX- tenda into the drawhar eliamher. and the sill or healn ia provided with a rearwardly extendinpr portion n3.

B represente a eoupler which may he of aniF usual or `enitahle type and which preferahlv han a short shank Z which enters the openin; r n* in the sill or heani and in conneeted h v means of a pivot pin o to a yoke which in alidahlv arranged in the drawhar ehamher of the `will or heani. thus permitting the eouplee head to swing Sidewise and to move lengthwise ot the locomotive or ttender. ,ly means ot this arrangement the Swinging' movement of the coupler is limited hy the side walls ot the opening a?. In the construction showin the pivot pin b may he seeured in place by inserting the Same through a hole b2 in the top wall of the sill' or beam into the pivot holes in the coupler shank and the yoke C. the hole h2 heilig preferably closed hy means of a Suitable reniovahle eap b". A hole b* is provided in the hottom wall of the Sill or beam through which a tool may be passed for driving the pivot. pin upwardly through the opening b2. Any other suitable means for pivotally connectingthe coupler shank with the yoke C maiI -be employed.

The inner end of the coupler Shank bears against a Wedge D which extends transverselv through the voke C and is slflnble lengthwise in the drawbar chamber fr. This wedge is provided at its oppoaite sides with oblique facon d which ronverge inwardly. The outward movement of the wedge l) in the drawbar chamber is limited by means of -ehonlders or sto i portiona d formed on the sill or beam. l"hr rontarting faces of the wedge and roupler shank arel preferabhr :aimed ronrentriealllv with the pivotal connei-tion between th(` roupler shank and the rohe (l so as to' permit the Swinging or pivotal movement of the roupler. The oblique fai-w` of the wedge I) bear against corresponding oblique fares w of two oliipositely disposed friction blorlie E E, whirh are arranged in the drawbar chamber at opposite aides of the wedge l). The frirtion blocks ll bear at' their inner faces against a plate or follower lf" arranged transversel)r in the buller rhamber and bearing' at ite inner or reatfare :n minvlt 4aholildetia` j' whit-h are prefornhlv l'oiiord integral!)Y with the sill :n beam.. The volw t" paseos around the follourr l` no that when thil rwtpler in subit-rind u draft or polling rain` the follower lf will mml'orwardli with the )'olol "lila lriviion bln/:lis ll 'll are preafal agaimzt the oliliipie faro oi" [no wedge l) b v owing! plato o= left poing-a ti arranged at opposite Side nl the drawbar rhaniber in porlieta ,o formed in the sill or beam. Any number of leaf Springe` maY be employed and they ma)` be arranged in sets as desired to produce the required resiatanre to the lateral movement of the friction blorlca ll. The springs 4liown are arranged in three Pgroupe or sets :it each Side and are adapted to offer a re- Sintanre of approximatrix' two hundred thou- Sand pounds to th iii/weinrot of the cou-- oler in either dirt-#tion VThen tl e eouplrr ihiet-tell to baiting or pimhing traina the shanlt will push the wedge L rearmndlv and spread the frii'tion lilorlw l" against the af'tion of the leaf Springa` When the eoupler receives pulling` or drawt ig strains, the `volte C draws the follower F outwardly or forwardly, which me ves the friction blot-ks E forwardly :igaint the oblique faces l of the wedge D, rauein,"r the friction blocks to move laterally against the notion of the springs (i, the wedge l) in this ease being held against forward movement by the Stops or shoulders d. y

The rear or inner face of the yoke C bears against a serond wedge H arranged in the drawbar Chamber and provided at its sides with oblique fares 1L which bear against corriwponding faces of friction bloeks The wedge H is held against forward or outward movement in the drawbar chamber by imam of the ahoulders or inwardly extendine' projertionsf of the sill or beam. The frietion hloclifsl I are pressed against the wedge Il lay means of spring plates or leaf springs K arranged in pockets formed in the Sill or shown in he drawings being adapted to otier a resistance of approxiniatel)r six hundred thousand pound!)l to the inward movement of the wedge Il. The rear frietion element constituted by the Wedge H, thiI frirtion blot-lts l and the leaf springs K, resists the movement of the coupler in buffing only'. and in the butlinlgn artion of the deriee this resistance is added to the resistanee of the front friction element ('onstituted by the wedge l)`r friction blocks E and springs (i. The rombined resistance of these two friction elements is sufficient to withtand the hotlineA artion ot the heaviest locomotives now used and by employing the outer l'rif'tion element onlyY to resist. the drawing or pullingr strains, which are much lee than flaI boiling strains, a Igood cushioning' i-tl'of'! i;-. prodtived in drawing,r as Well as ,-1 ntlirientlv hielt apar-ity to oushion the boilingV ahorita, Any` `Suitable provision may he made t'or inh'ertimhr the springe` (ii and K, into tin' portret o and ln the construction .shown the porltetl f/ and are rovided with openings L in their bottom wa ls which are of sufficient size to permit the spring leaves to he inserted into the Joekets. The pockets are closed by means of plates l held in place by bolts l extending through the end sill or )ilot beam and passing through holes in thl` plates I. The other parts of the gear ran be readily assembled through the drawbar openingv iii the front of the beam or sill.

The draft and buliing device described has the advantage of having sufficient capacity to enshion the heaviest boiling shocks and at the same time offering a much Smaller re- `manet to the drawing or pulling efforts. The device is so construe-ted as to enable the same to be houaed within the end 'sill or pilot beam of a locomotive, or similar beam, without unduly increasing the transverse dimensions of the sill or beam. l

claim as my invention:

vlt The eombination of a metal end sill having a chamber in the middle portion thereof, two wedges arranged onel in front ot' the other erosswiee of the sill in said ehamber, a Coupler arranged at, the front of said lsill to move the front wedge rearwardly, a member arranged to move the rear wedge when the coupler is moved rearwardly and to permitfforward movement of the coupler independently of the rear wedge, friction means in Said chamber coperating with the front wedge to yieldingly resist both forward and rearward movement` of the coupler, and supplemental friction means in said chamber copelating with the resst rearward drawhm; chaunlmr laterally with regard t0.

feaid' pgwabe member, and connections hw tween said movable mvmben and aid fric-v t'nn devices for musing; both sets of friction devcegto resist like xrmvument of Sad muvabf; member in one drmzin mul fm' causing one,4 s t of frivtin im'fe to Iesst thu muvmel'l 0f the movable member in the other drectinn. y

3. The cnm'lmton nf :1 met@ En@ gli having a, dumber in 'he middl pmtml thm-sn?, tw@ vfedgvs arranged oma'n Emili of The oihepmsswsc of the sill in said chamber, a couper arranged in .front of Said from; wedge to move the wedge man wuz-H52 u Yoke cuxuleufod t0 the coupler :md passing lwl\"veu said xwdgc 'Fm' pushing tw vom' wwgre when the unuprr is. nuwe@ wirwfnsxly, filutma nui-inw in said iainum' cuijpel'uilng: wh Vin; mi aaedge tv la-,hi img {jf l'vsm'i birth fnr'mu'x and* :IWF mmm ha plr :mrf mmable momber bein adapted t0 for@ said Wedges against said )locks when n'mvnin um; @iw-#UML and means' engaging; thu f1-ntima @hacks of mw of said sots of fx'ctnn avisen fm' moving Suid bucks reim wly tu fh@ wedgv when S'fmdmovabe mem ber mmv: in m Gtmr liz'ecion.

i. The cmnbnntmy of n]101 l0w member 'having :x Lil-:mbar chamber, n cmlper haw ing d hankmovnhe 'luto said Chamber; two wtf. of f'lgam russtau-e dev'ices arranged in Sad drawbm vhumber .lni'nrally wih un in .saza s'umk, and comlectoxls bv Said hfmk and said sets nf resistance (,evich for transmitting the movement of the coupler in lmlng To both seas of Said nf tim wuplor in puling tp only one niet of lmxug a dmwbr chamber, a yoke movable D@ mi) 'n A vw. 

